Abstract:The foreign no-till seeders are heavy, big and expensive, they are not suitable to the Chinese situation of small size land, small tractor power and poor rural economy, and therefore, developing local light no-till seeders is necessary in China. With 10 year efforts since early 90's of the last century, a batch of light no-till seeders with passive anti-blockage were successfully developed and widely applied in one-crop-a-year region of north China. However, the anti-blockage ability of those seeders were limited and hardly used in high yield area. From 2000, several innovative no-till seeders based on active anti-blockage have been created; their anti-blockage abilities reached to international advanced level, the weight of the seeders 50% lighter and price 80% lower than the foreign no-till seeders. The design ideas of foreign no-till seeder are heavy weight and passive anti-blockage; ours are light weight, passive and active anti-blockage for different yield lands. 80 000 more sets of light no-till seeders were used in 2007, among them, over 20 000 sets had high anti-blockage ability with power driven. China became the first country in using light seeders to realize conservation tillage in the world.
